Greenpeace was formed in 1971 and has opposed nuclear testing and proliferation through direct actions like voyages to disrupt nuclear tests. They have pressured governments to enact legislation suspending nuclear tests and worked to end nuclear programs in various countries. However, in 2006 the co-founder of Greenpeace announced his support for nuclear energy as a way to address climate change, contradicting Greenpeace's position advocating against nuclear energy due to safety and environmental risks.